Respirator control



5, 1940- J. L. BLOOMHEART 2,220,672

RESPIRATOR CONTROL Filed March 16, 19 59 v John. LfilunmheurL resuscitator or inhaler type of apparatus, such as shown in McKesson Patent Patented Nov. 5, 1940 PATIENT,

Fries RE SPIRAT'OR CONTROL? John L. Bloomheart, Toledo, Ohio, assigno r to Martha F. McKesson, Toledo, Ohio Application March 16, 1939, Serial No. 262,089

4 Claims.

This invention relates to breathing apparatus, especially for supplying inhalation gas for respiration in controlled volume.

This invention has utility when incorporated in adjustable features for limitingthe range for antomatic sequence of operations, more particularly as to the quantity per inhalation;

Referring to the drawing: a

Fig. 1 is a side elevation, with parts broken away, of an embodiment of the invention in a No. 2,083,043, December 8, 1936;

Fig. 2 is a plan view of the control features of the motor and pump of Fig. 1;

Fig. 3 is a view on the line III-III, showing the indicator;

Fig. 4 is a section on the line IVIV, Fig. 2, showing features of the valve and adjustable control lever therefor; and

Fig. 5 is a view on the line VV, Fig. 2, show,- ing the valve housing in elevation and the limits for the control.

Gas under pressure may be in container I, say as oxygen, to have flow therefrom controlled by valve 2 for passage by reducing valve 3. The pressure of this supply gas from the chamber I may be through duct 4 to gage 5. This supply gas from the reducing valve 3 may be effective by opening valve 6 for-flow by way of duct 1 into housing 8 to fitting 9 mounted on valve housing I0. Communication of fitting 9 to the housing I0 is by port I I. This fitting 9 is provided with cap 22 for supply of lubricant through port I3 for oscillating member I4 in valve chamber I5. Fixed with this member I4 is arm I6 having terminal Fig. 1,

roller or offset' I I to abut cushion I8 on set screw I9 at one limit of throw and cushion 25 of rubber on set screw 2I at its other limit of throw. Angularly fixed as to this arm I6 but at the opposite end of this valve member I4 is arm 22 having offset 23 engaged by tension helical spring 24 extending to pin 25 at the free end of parallel lever arms 25, 21. lever arm 25 by screws 28 is supplemental arm having ofiset 29 and forks 30 having at their free ends fingers 3|, 32, adapted to engage the helical spring 24 in the throw limit positions of this lever device 26, 21, having pin 33 engaged by bracket 34 fixed with piston rod 35. This lever 26, 21, intermediate the pins 25, 33, has therealong seat portions or slots 36 engaged by fulcrum bearing-providing portions 31 on link 38 rising from pin 39 at cylinder head portion 40.

This link 38, medially of its length, has pin 4| Fixed with the from which extends yoke or U-s'haped member 42 engaged bynut 43 on axially fixed screw 44 projecting from the housing 8 to have hand wheel 45. Rising from this nut 43 as engaging the yoke 42 is stem 46 to carry indicator 4'! above slot 48 in thehousing 8 in proximity to 'marker region 49 (Fig. 3). This adjustment limit marker or gage scheme'means that with the nut 43 adjusted from thehand wheel 44 to shove the yoke 42 toward the valve casing "i0 thereby rocks the link i 38 to shift the fulcrum 31. to such extent toward the casing I5 that'thetransit ortravel distance for thepiston rod His-increased before the lever actuator controls the valve to give it a snap throw in thereverse direction. As there is hand adjustment at the hand wheel 451:0; the reverse limit, it means that the lever is more sensitive to less transit of the piston rod 35 and thus cuts oif and duct 53 for down stroke and port 54 and duct 55 for up stroke of this fluid motor and reciprocatory device.

Through lower piston head 55 (Fig. 1) of this piston and cylinder device, piston rod 35 extends through chamber 5'1 to wall 58 having bellows connection 59 with housing 63. This means that, as the valve device I4 is in the position shown in Fig. 4 for downward stroke of the piston 35, exhaust from the lower side of the motor device may flow by duct 55to this valve I Q and therefrom by port GI and duct 62- to charge this chamber 51. At the reverse operation, the contraction of the chamber 51 causes flow therefrom by housing device 63 and duct 54 to mask 65 at the patient, wherein there is located pressure relief valve 65 and its adjustable resistance control 51. At the fitting 63 there is relief valve device 58.

As the power stroke of the motor is away from the bellows device of the pump, the exhaust from the previous upper or power stroke is by way of the duct 53 into the casing I0 and by way of the duct 62 to thebellowsas in excess of the exhaust. This supply of inhalation gas by the motor through this pump is of resuscitator action to the patient in furnishing inhalation for the patient. The reverse stroke on expanding ofthe bellows is an exhalation promoting factor beyond that of the capacity of the gas supplied and.

in determining the frequency of reciprocation'of these devices, while the adjustment at the hand wheel 45 is a definite factor in determining the volume. It is thus seen that hereunder these adjustments permit a range of volume control for respiratory gases to a patient for resuscitation or breathing inhalation over ranges as may be appropriate.

What is claimed and it is desired to secure by United States Letters Patent is:

1. For respiration apparatus involving a fluid pump, the combination of an interconnected fluid motor, said pump and motor having a common reciprocable transmission rod therebetween, motive fluid connection for efiecting power stroke of the rod in opposite directions, a control valve for the pump, and a motor actuator controller for the valve including a lever pivotally connected to the rod rockable relativelyto the valve, a quick throw connection from the lever to snap the valve adjacent travel limit position of the lever for directing to the pump motive fluid exhaust from the opposite directions of the motor operation, and means for adjusting the fulcrum of the lever to vary the functioning of the motor, thereby determining the pulsing volume for the pump to handle from the exhausts of the motor.

2. For respiration apparatus involving a reciprocatory fluid pump, the combination of an interconnected fluid motor, said pump and motor having a common reciprocable transmission rod therebetween, motive fluid connection for effecting power stroke of the rod in opposite directions, a rockable control valve :for the pump, and a motor actuator controller for the valve including a bracket fixed with the rod, a lever pivoted to the bracket and rockable relatively to the valve, a quick throw connection from the lever to device in opposite directions, a rockable control valve for the pump device, a bracket fixed with the rod, a lever pivoted to the bracket and rockable relatively to the valve, a rockable link providing a shiftable fulcrum for the lever, and means for adjusting the fulcrum of the lever to vary the stroke of one of the devices, in thereby determining the pulsing volume for the pump device to handle from the exhausts of the motor device.

4. For respiratory apparatus involving a reciprocable fluid pump device, the combination therewith of an interconnected motor device, motive fluid connection for effecting power stroke of the device in opposite directions, a rockable control valve for the pump device, a bracket fixed with the rod, a lever pivoted to the bracket, rockable relatively to the valve and having seat means therealong for a fulcrum bearing, a rockable link providing a shiftable fulcrum for coacting with said seat means of the lever, and means for adjusting the fulcrum of the lever to vary the stroke of the motor device, in thereby determining the pulsing volume for the pump device to handle from the exhausts ofthe motor device.

JOHN L. BLOOMI-IEART. 

